./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:50:41,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:50:41,992 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:50:41,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:50:41,999 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:50:42,025 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:50:42,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:50:42,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:50:42,027 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:50:42,030 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:50:42,030 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:50:42,031 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:50:42,031 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:50:42,032 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:50:42,032 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:50:42,032 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:50:42,033 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:50:42,033 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:50:42,033 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:50:42,033 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:50:42,033 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:50:42,034 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:50:42,034 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:50:42,035 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:50:42,035 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:50:42,035 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:50:42,035 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:50:42,035 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:50:42,036 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:50:42,036 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:50:42,037 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:50:42,037 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:50:42,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:50:42,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:50:42,038 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:50:42,038 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:50:42,039 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:50:42,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:50:42,039 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:50:42,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:50:42,039 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:50:42,040 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:50:42,040 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:50:42,040 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:50:42,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:50:42,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:50:42,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:50:42,293 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:50:42,294 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:50:42,295 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2024-02-19 14:50:43,470 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:50:43,653 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:50:43,653 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2024-02-19 14:50:43,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d09d896/6f9183b3cfd04a8fa4bc290eee8bd671/FLAG8efe89655 [2024-02-19 14:50:43,674 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12d09d896/6f9183b3cfd04a8fa4bc290eee8bd671 [2024-02-19 14:50:43,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:50:43,677 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:50:43,679 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:50:43,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:50:43,683 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:50:43,684 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:43,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679d2c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43, skipping insertion in model container [2024-02-19 14:50:43,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:43,703 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:50:43,880 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2024-02-19 14:50:43,891 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:50:43,900 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:50:43,931 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2024-02-19 14:50:43,937 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:50:43,949 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:50:43,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43 WrapperNode [2024-02-19 14:50:43,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:50:43,950 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:50:43,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:50:43,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:50:43,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:43,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,001 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 201 [2024-02-19 14:50:44,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:50:44,002 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:50:44,003 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:50:44,003 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:50:44,011 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,032 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,072 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 12, 2, 2]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 2, 1, 1]. [2024-02-19 14:50:44,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,089 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,095 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:50:44,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:50:44,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:50:44,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:50:44,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (1/1) ... [2024-02-19 14:50:44,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:50:44,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:50:44,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-19 14:50:44,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-19 14:50:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:50:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-19 14:50:44,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-19 14:50:44,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-19 14:50:44,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-19 14:50:44,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:50:44,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:50:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:50:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-19 14:50:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:50:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:50:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:50:44,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:50:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-19 14:50:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 14:50:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 14:50:44,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-19 14:50:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:50:44,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:50:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-19 14:50:44,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-19 14:50:44,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-19 14:50:44,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-19 14:50:44,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:50:44,217 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:50:44,327 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:50:44,328 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:50:44,675 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:50:44,676 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:50:44,908 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:50:44,909 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-19 14:50:44,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:50:44 BoogieIcfgContainer [2024-02-19 14:50:44,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:50:44,911 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:50:44,911 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:50:44,913 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:50:44,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:50:43" (1/3) ... [2024-02-19 14:50:44,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434e0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:50:44, skipping insertion in model container [2024-02-19 14:50:44,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:50:43" (2/3) ... [2024-02-19 14:50:44,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@434e0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:50:44, skipping insertion in model container [2024-02-19 14:50:44,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:50:44" (3/3) ... [2024-02-19 14:50:44,917 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-02-19 14:50:44,932 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:50:44,932 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:50:44,932 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:50:44,971 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-19 14:50:45,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2024-02-19 14:50:45,019 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-02-19 14:50:45,020 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:50:45,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-02-19 14:50:45,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2024-02-19 14:50:45,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2024-02-19 14:50:45,030 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:50:45,035 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2459fa74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:50:45,035 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 14:50:45,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:50:45,048 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2024-02-19 14:50:45,048 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:50:45,048 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:45,049 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:45,049 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:45,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1032021544, now seen corresponding path program 1 times [2024-02-19 14:50:45,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:45,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500688991] [2024-02-19 14:50:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:50:45,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500688991] [2024-02-19 14:50:45,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500688991] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:45,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:45,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-19 14:50:45,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341411456] [2024-02-19 14:50:45,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:45,302 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:50:45,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:50:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:50:45,330 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-02-19 14:50:45,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:45,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:45,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-02-19 14:50:45,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:45,408 INFO L124 PetriNetUnfolderBase]: 96/186 cut-off events. [2024-02-19 14:50:45,408 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-02-19 14:50:45,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 186 events. 96/186 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 659 event pairs, 13 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 285. Up to 132 conditions per place. [2024-02-19 14:50:45,411 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 25 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-02-19 14:50:45,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 147 flow [2024-02-19 14:50:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:50:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:50:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-02-19 14:50:45,420 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-02-19 14:50:45,423 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-02-19 14:50:45,423 INFO L507 AbstractCegarLoop]: Abstraction has has 29 places, 34 transitions, 147 flow [2024-02-19 14:50:45,424 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:45,424 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:45,424 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:45,424 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:50:45,424 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:45,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1778350520, now seen corresponding path program 1 times [2024-02-19 14:50:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:45,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147198372] [2024-02-19 14:50:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:50:45,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:45,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147198372] [2024-02-19 14:50:45,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147198372] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:45,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:45,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:50:45,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105919030] [2024-02-19 14:50:45,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:45,638 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:50:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:45,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:50:45,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:50:45,641 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-02-19 14:50:45,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 34 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:45,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:45,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-02-19 14:50:45,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:45,780 INFO L124 PetriNetUnfolderBase]: 107/224 cut-off events. [2024-02-19 14:50:45,780 INFO L125 PetriNetUnfolderBase]: For 56/76 co-relation queries the response was YES. [2024-02-19 14:50:45,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 224 events. 107/224 cut-off events. For 56/76 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 875 event pairs, 22 based on Foata normal form. 8/222 useless extension candidates. Maximal degree in co-relation 412. Up to 163 conditions per place. [2024-02-19 14:50:45,783 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 27 selfloop transitions, 2 changer transitions 15/49 dead transitions. [2024-02-19 14:50:45,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 307 flow [2024-02-19 14:50:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-02-19 14:50:45,786 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2024-02-19 14:50:45,787 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-02-19 14:50:45,787 INFO L507 AbstractCegarLoop]: Abstraction has has 33 places, 49 transitions, 307 flow [2024-02-19 14:50:45,788 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:45,788 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:45,788 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:45,789 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 14:50:45,790 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:45,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash -635551525, now seen corresponding path program 1 times [2024-02-19 14:50:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:45,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743849891] [2024-02-19 14:50:45,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:45,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:45,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:45,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743849891] [2024-02-19 14:50:45,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743849891] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:45,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:45,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:50:45,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954112703] [2024-02-19 14:50:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:45,937 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:50:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:50:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:50:45,947 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-02-19 14:50:45,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 49 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:45,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:45,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-02-19 14:50:45,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:46,098 INFO L124 PetriNetUnfolderBase]: 208/431 cut-off events. [2024-02-19 14:50:46,098 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-02-19 14:50:46,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 431 events. 208/431 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1887 event pairs, 30 based on Foata normal form. 4/430 useless extension candidates. Maximal degree in co-relation 950. Up to 247 conditions per place. [2024-02-19 14:50:46,104 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 4 changer transitions 31/92 dead transitions. [2024-02-19 14:50:46,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 92 transitions, 750 flow [2024-02-19 14:50:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-02-19 14:50:46,107 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-02-19 14:50:46,109 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2024-02-19 14:50:46,109 INFO L507 AbstractCegarLoop]: Abstraction has has 37 places, 92 transitions, 750 flow [2024-02-19 14:50:46,109 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:46,109 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:46,109 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:46,109 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 14:50:46,109 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:46,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:46,110 INFO L85 PathProgramCache]: Analyzing trace with hash 910965691, now seen corresponding path program 2 times [2024-02-19 14:50:46,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:46,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737294172] [2024-02-19 14:50:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:46,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:46,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:46,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737294172] [2024-02-19 14:50:46,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737294172] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:50:46,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775337937] [2024-02-19 14:50:46,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:50:46,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:46,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:50:46,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:50:46,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:50:46,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:50:46,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:50:46,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-19 14:50:46,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:50:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:46,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:50:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:46,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775337937] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:50:46,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:50:46,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-02-19 14:50:46,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117485335] [2024-02-19 14:50:46,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:50:46,362 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:50:46,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:46,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:50:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:50:46,367 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:46,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 92 transitions, 750 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:46,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:46,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:46,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:46,604 INFO L124 PetriNetUnfolderBase]: 409/741 cut-off events. [2024-02-19 14:50:46,604 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-02-19 14:50:46,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3314 conditions, 741 events. 409/741 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3213 event pairs, 6 based on Foata normal form. 16/752 useless extension candidates. Maximal degree in co-relation 2376. Up to 486 conditions per place. [2024-02-19 14:50:46,608 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 142 selfloop transitions, 48 changer transitions 52/243 dead transitions. [2024-02-19 14:50:46,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 243 transitions, 2389 flow [2024-02-19 14:50:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:50:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:50:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 146 transitions. [2024-02-19 14:50:46,610 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-02-19 14:50:46,611 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2024-02-19 14:50:46,611 INFO L507 AbstractCegarLoop]: Abstraction has has 50 places, 243 transitions, 2389 flow [2024-02-19 14:50:46,611 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:46,611 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:46,611 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:46,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 14:50:46,822 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:46,823 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:46,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1049857020, now seen corresponding path program 1 times [2024-02-19 14:50:46,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:46,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988411257] [2024-02-19 14:50:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:46,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:46,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:46,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988411257] [2024-02-19 14:50:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988411257] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:46,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:46,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:50:46,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511790229] [2024-02-19 14:50:46,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:46,899 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:50:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:50:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:50:46,905 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-02-19 14:50:46,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 243 transitions, 2389 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:46,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:46,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-02-19 14:50:46,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:47,025 INFO L124 PetriNetUnfolderBase]: 415/755 cut-off events. [2024-02-19 14:50:47,025 INFO L125 PetriNetUnfolderBase]: For 1063/1063 co-relation queries the response was YES. [2024-02-19 14:50:47,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4083 conditions, 755 events. 415/755 cut-off events. For 1063/1063 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3313 event pairs, 0 based on Foata normal form. 8/758 useless extension candidates. Maximal degree in co-relation 3176. Up to 493 conditions per place. [2024-02-19 14:50:47,030 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 172 selfloop transitions, 15 changer transitions 76/275 dead transitions. [2024-02-19 14:50:47,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 275 transitions, 3237 flow [2024-02-19 14:50:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-02-19 14:50:47,031 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-02-19 14:50:47,031 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2024-02-19 14:50:47,031 INFO L507 AbstractCegarLoop]: Abstraction has has 54 places, 275 transitions, 3237 flow [2024-02-19 14:50:47,031 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:47,032 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:47,032 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:47,032 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:50:47,032 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:47,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1231650454, now seen corresponding path program 2 times [2024-02-19 14:50:47,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:47,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951831318] [2024-02-19 14:50:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:47,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:47,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951831318] [2024-02-19 14:50:47,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951831318] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:50:47,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788833344] [2024-02-19 14:50:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:50:47,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:47,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:50:47,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:50:47,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:50:47,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:50:47,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:50:47,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-19 14:50:47,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:50:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:47,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:50:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:47,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788833344] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:50:47,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:50:47,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-02-19 14:50:47,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294648571] [2024-02-19 14:50:47,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:50:47,304 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-19 14:50:47,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-19 14:50:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-02-19 14:50:47,314 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:47,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 275 transitions, 3237 flow. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:47,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:47,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:47,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:47,621 INFO L124 PetriNetUnfolderBase]: 469/849 cut-off events. [2024-02-19 14:50:47,621 INFO L125 PetriNetUnfolderBase]: For 1172/1172 co-relation queries the response was YES. [2024-02-19 14:50:47,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5434 conditions, 849 events. 469/849 cut-off events. For 1172/1172 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3818 event pairs, 0 based on Foata normal form. 14/858 useless extension candidates. Maximal degree in co-relation 4341. Up to 565 conditions per place. [2024-02-19 14:50:47,626 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 219 selfloop transitions, 87 changer transitions 79/386 dead transitions. [2024-02-19 14:50:47,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 386 transitions, 5222 flow [2024-02-19 14:50:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-19 14:50:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-19 14:50:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 140 transitions. [2024-02-19 14:50:47,627 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-02-19 14:50:47,628 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2024-02-19 14:50:47,628 INFO L507 AbstractCegarLoop]: Abstraction has has 67 places, 386 transitions, 5222 flow [2024-02-19 14:50:47,628 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:47,628 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:47,628 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:47,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:50:47,839 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-19 14:50:47,839 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:47,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:47,840 INFO L85 PathProgramCache]: Analyzing trace with hash -671525372, now seen corresponding path program 3 times [2024-02-19 14:50:47,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:47,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061448708] [2024-02-19 14:50:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:47,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:47,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061448708] [2024-02-19 14:50:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061448708] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:47,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:47,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:50:47,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183924226] [2024-02-19 14:50:47,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:47,909 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:50:47,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:50:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:50:47,914 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:47,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 386 transitions, 5222 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:47,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:47,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:47,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:48,086 INFO L124 PetriNetUnfolderBase]: 508/914 cut-off events. [2024-02-19 14:50:48,087 INFO L125 PetriNetUnfolderBase]: For 1360/1360 co-relation queries the response was YES. [2024-02-19 14:50:48,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6741 conditions, 914 events. 508/914 cut-off events. For 1360/1360 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4182 event pairs, 0 based on Foata normal form. 12/921 useless extension candidates. Maximal degree in co-relation 5376. Up to 602 conditions per place. [2024-02-19 14:50:48,093 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 292 selfloop transitions, 37 changer transitions 85/415 dead transitions. [2024-02-19 14:50:48,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 415 transitions, 6432 flow [2024-02-19 14:50:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-02-19 14:50:48,094 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-02-19 14:50:48,095 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2024-02-19 14:50:48,095 INFO L507 AbstractCegarLoop]: Abstraction has has 71 places, 415 transitions, 6432 flow [2024-02-19 14:50:48,095 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:48,096 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:48,096 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:48,096 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-19 14:50:48,096 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:48,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1396914240, now seen corresponding path program 4 times [2024-02-19 14:50:48,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:48,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179321543] [2024-02-19 14:50:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:48,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:48,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179321543] [2024-02-19 14:50:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179321543] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:50:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341589366] [2024-02-19 14:50:48,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:50:48,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:48,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:50:48,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:50:48,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:50:48,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:50:48,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:50:48,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-19 14:50:48,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:50:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:48,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:50:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:48,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341589366] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:50:48,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:50:48,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-02-19 14:50:48,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706485606] [2024-02-19 14:50:48,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:50:48,308 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-19 14:50:48,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-19 14:50:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-02-19 14:50:48,313 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:48,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 415 transitions, 6432 flow. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:48,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:48,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:48,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:48,509 INFO L124 PetriNetUnfolderBase]: 542/968 cut-off events. [2024-02-19 14:50:48,509 INFO L125 PetriNetUnfolderBase]: For 1390/1390 co-relation queries the response was YES. [2024-02-19 14:50:48,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8097 conditions, 968 events. 542/968 cut-off events. For 1390/1390 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4472 event pairs, 0 based on Foata normal form. 8/971 useless extension candidates. Maximal degree in co-relation 6548. Up to 642 conditions per place. [2024-02-19 14:50:48,541 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 280 selfloop transitions, 69 changer transitions 85/435 dead transitions. [2024-02-19 14:50:48,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 435 transitions, 7590 flow [2024-02-19 14:50:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-19 14:50:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-19 14:50:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-02-19 14:50:48,542 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-02-19 14:50:48,542 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 51 predicate places. [2024-02-19 14:50:48,543 INFO L507 AbstractCegarLoop]: Abstraction has has 78 places, 435 transitions, 7590 flow [2024-02-19 14:50:48,543 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:48,543 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:48,543 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:48,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 14:50:48,743 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:48,744 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:48,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1413817975, now seen corresponding path program 3 times [2024-02-19 14:50:48,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:48,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204028217] [2024-02-19 14:50:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:48,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:48,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:48,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204028217] [2024-02-19 14:50:48,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204028217] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:50:48,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770415066] [2024-02-19 14:50:48,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:50:48,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:48,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:50:48,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:50:48,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:50:48,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-19 14:50:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:50:48,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-19 14:50:48,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:50:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:48,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:50:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:48,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770415066] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:50:48,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:50:48,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-02-19 14:50:48,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401898833] [2024-02-19 14:50:48,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:50:48,980 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-19 14:50:48,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:48,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-19 14:50:48,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-02-19 14:50:48,987 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:48,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 435 transitions, 7590 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:48,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:48,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:48,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:49,290 INFO L124 PetriNetUnfolderBase]: 654/1160 cut-off events. [2024-02-19 14:50:49,290 INFO L125 PetriNetUnfolderBase]: For 1580/1580 co-relation queries the response was YES. [2024-02-19 14:50:49,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10883 conditions, 1160 events. 654/1160 cut-off events. For 1580/1580 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5571 event pairs, 0 based on Foata normal form. 10/1165 useless extension candidates. Maximal degree in co-relation 9150. Up to 798 conditions per place. [2024-02-19 14:50:49,300 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 308 selfloop transitions, 110 changer transitions 85/504 dead transitions. [2024-02-19 14:50:49,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 504 transitions, 9787 flow [2024-02-19 14:50:49,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 14:50:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 14:50:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 159 transitions. [2024-02-19 14:50:49,301 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-02-19 14:50:49,302 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 65 predicate places. [2024-02-19 14:50:49,302 INFO L507 AbstractCegarLoop]: Abstraction has has 92 places, 504 transitions, 9787 flow [2024-02-19 14:50:49,302 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:49,302 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:49,302 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:49,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-19 14:50:49,513 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:49,514 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:49,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash 733208923, now seen corresponding path program 4 times [2024-02-19 14:50:49,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:49,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831120011] [2024-02-19 14:50:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:49,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:49,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:49,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831120011] [2024-02-19 14:50:49,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831120011] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:49,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:49,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:50:49,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763380563] [2024-02-19 14:50:49,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:49,564 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:50:49,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:49,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:50:49,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:50:49,570 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-02-19 14:50:49,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 504 transitions, 9787 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:49,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:49,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-02-19 14:50:49,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:49,738 INFO L124 PetriNetUnfolderBase]: 656/1166 cut-off events. [2024-02-19 14:50:49,738 INFO L125 PetriNetUnfolderBase]: For 2164/2164 co-relation queries the response was YES. [2024-02-19 14:50:49,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11995 conditions, 1166 events. 656/1166 cut-off events. For 2164/2164 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5624 event pairs, 0 based on Foata normal form. 4/1165 useless extension candidates. Maximal degree in co-relation 10061. Up to 801 conditions per place. [2024-02-19 14:50:49,748 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 352 selfloop transitions, 35 changer transitions 90/508 dead transitions. [2024-02-19 14:50:49,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 508 transitions, 10821 flow [2024-02-19 14:50:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-02-19 14:50:49,750 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-02-19 14:50:49,750 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 69 predicate places. [2024-02-19 14:50:49,750 INFO L507 AbstractCegarLoop]: Abstraction has has 96 places, 508 transitions, 10821 flow [2024-02-19 14:50:49,750 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:49,750 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:49,751 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:49,751 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-19 14:50:49,751 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:49,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1288102400, now seen corresponding path program 5 times [2024-02-19 14:50:49,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:49,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224710244] [2024-02-19 14:50:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:49,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:49,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:49,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224710244] [2024-02-19 14:50:49,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224710244] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:49,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:49,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:50:49,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664947893] [2024-02-19 14:50:49,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:49,797 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:50:49,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:50:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:50:49,804 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-02-19 14:50:49,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 508 transitions, 10821 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:49,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:49,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-02-19 14:50:49,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:50,010 INFO L124 PetriNetUnfolderBase]: 662/1180 cut-off events. [2024-02-19 14:50:50,010 INFO L125 PetriNetUnfolderBase]: For 2365/2365 co-relation queries the response was YES. [2024-02-19 14:50:50,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13225 conditions, 1180 events. 662/1180 cut-off events. For 2365/2365 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5723 event pairs, 0 based on Foata normal form. 8/1183 useless extension candidates. Maximal degree in co-relation 11039. Up to 808 conditions per place. [2024-02-19 14:50:50,021 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 352 selfloop transitions, 34 changer transitions 99/516 dead transitions. [2024-02-19 14:50:50,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 516 transitions, 11973 flow [2024-02-19 14:50:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-02-19 14:50:50,022 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-02-19 14:50:50,023 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 73 predicate places. [2024-02-19 14:50:50,023 INFO L507 AbstractCegarLoop]: Abstraction has has 100 places, 516 transitions, 11973 flow [2024-02-19 14:50:50,023 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:50,023 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:50,023 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:50,023 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-19 14:50:50,023 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:50,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 697733565, now seen corresponding path program 5 times [2024-02-19 14:50:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875678181] [2024-02-19 14:50:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:50,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:50,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875678181] [2024-02-19 14:50:50,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875678181] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:50,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:50,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:50:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291378150] [2024-02-19 14:50:50,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:50,113 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:50:50,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:50:50,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:50:50,120 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:50,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 516 transitions, 11973 flow. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:50,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:50,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:50,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:50,340 INFO L124 PetriNetUnfolderBase]: 650/1168 cut-off events. [2024-02-19 14:50:50,340 INFO L125 PetriNetUnfolderBase]: For 2501/2501 co-relation queries the response was YES. [2024-02-19 14:50:50,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14247 conditions, 1168 events. 650/1168 cut-off events. For 2501/2501 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5715 event pairs, 0 based on Foata normal form. 12/1175 useless extension candidates. Maximal degree in co-relation 11919. Up to 800 conditions per place. [2024-02-19 14:50:50,354 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 369 selfloop transitions, 43 changer transitions 97/510 dead transitions. [2024-02-19 14:50:50,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 510 transitions, 12847 flow [2024-02-19 14:50:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-02-19 14:50:50,355 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-02-19 14:50:50,356 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 77 predicate places. [2024-02-19 14:50:50,357 INFO L507 AbstractCegarLoop]: Abstraction has has 104 places, 510 transitions, 12847 flow [2024-02-19 14:50:50,357 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:50,357 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:50,357 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:50,357 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-19 14:50:50,357 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:50,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash -552029093, now seen corresponding path program 6 times [2024-02-19 14:50:50,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:50,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568793541] [2024-02-19 14:50:50,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:50,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:50,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:50,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568793541] [2024-02-19 14:50:50,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568793541] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:50,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:50,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-19 14:50:50,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857728140] [2024-02-19 14:50:50,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:50,434 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 14:50:50,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 14:50:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-19 14:50:50,441 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:50,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 510 transitions, 12847 flow. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:50,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:50,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:50,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:50,673 INFO L124 PetriNetUnfolderBase]: 640/1158 cut-off events. [2024-02-19 14:50:50,673 INFO L125 PetriNetUnfolderBase]: For 2489/2489 co-relation queries the response was YES. [2024-02-19 14:50:50,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15273 conditions, 1158 events. 640/1158 cut-off events. For 2489/2489 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5708 event pairs, 0 based on Foata normal form. 10/1163 useless extension candidates. Maximal degree in co-relation 12755. Up to 790 conditions per place. [2024-02-19 14:50:50,683 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 356 selfloop transitions, 53 changer transitions 97/507 dead transitions. [2024-02-19 14:50:50,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 507 transitions, 13781 flow [2024-02-19 14:50:50,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:50:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:50:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-02-19 14:50:50,685 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-02-19 14:50:50,686 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 82 predicate places. [2024-02-19 14:50:50,686 INFO L507 AbstractCegarLoop]: Abstraction has has 109 places, 507 transitions, 13781 flow [2024-02-19 14:50:50,686 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:50,686 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:50,687 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:50,687 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-19 14:50:50,687 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:50,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:50,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1679370342, now seen corresponding path program 6 times [2024-02-19 14:50:50,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:50,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122198559] [2024-02-19 14:50:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:50,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122198559] [2024-02-19 14:50:50,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122198559] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:50,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:50,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-19 14:50:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958835776] [2024-02-19 14:50:50,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:50,758 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-19 14:50:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-19 14:50:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-02-19 14:50:50,763 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:50,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 507 transitions, 13781 flow. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:50,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:50,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:50,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:51,008 INFO L124 PetriNetUnfolderBase]: 658/1196 cut-off events. [2024-02-19 14:50:51,008 INFO L125 PetriNetUnfolderBase]: For 2625/2625 co-relation queries the response was YES. [2024-02-19 14:50:51,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16983 conditions, 1196 events. 658/1196 cut-off events. For 2625/2625 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5992 event pairs, 0 based on Foata normal form. 8/1199 useless extension candidates. Maximal degree in co-relation 14275. Up to 824 conditions per place. [2024-02-19 14:50:51,020 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 376 selfloop transitions, 46 changer transitions 97/520 dead transitions. [2024-02-19 14:50:51,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 520 transitions, 15175 flow [2024-02-19 14:50:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:50:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:50:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-02-19 14:50:51,021 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-02-19 14:50:51,021 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 87 predicate places. [2024-02-19 14:50:51,021 INFO L507 AbstractCegarLoop]: Abstraction has has 114 places, 520 transitions, 15175 flow [2024-02-19 14:50:51,022 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:51,022 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:51,022 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:51,022 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-19 14:50:51,022 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:51,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:51,023 INFO L85 PathProgramCache]: Analyzing trace with hash -247866602, now seen corresponding path program 7 times [2024-02-19 14:50:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:51,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513371960] [2024-02-19 14:50:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:51,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:51,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:51,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513371960] [2024-02-19 14:50:51,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513371960] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:51,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:51,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:50:51,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639570552] [2024-02-19 14:50:51,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:51,072 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:50:51,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:51,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:50:51,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:50:51,077 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-02-19 14:50:51,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 520 transitions, 15175 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:51,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:51,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-02-19 14:50:51,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:51,318 INFO L124 PetriNetUnfolderBase]: 633/1140 cut-off events. [2024-02-19 14:50:51,318 INFO L125 PetriNetUnfolderBase]: For 3041/3041 co-relation queries the response was YES. [2024-02-19 14:50:51,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17232 conditions, 1140 events. 633/1140 cut-off events. For 3041/3041 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5585 event pairs, 0 based on Foata normal form. 8/1143 useless extension candidates. Maximal degree in co-relation 14485. Up to 784 conditions per place. [2024-02-19 14:50:51,330 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 329 selfloop transitions, 35 changer transitions 98/493 dead transitions. [2024-02-19 14:50:51,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 493 transitions, 15284 flow [2024-02-19 14:50:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-02-19 14:50:51,332 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-02-19 14:50:51,333 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 91 predicate places. [2024-02-19 14:50:51,333 INFO L507 AbstractCegarLoop]: Abstraction has has 118 places, 493 transitions, 15284 flow [2024-02-19 14:50:51,333 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:51,333 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:51,333 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:51,333 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-19 14:50:51,334 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:51,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1773444721, now seen corresponding path program 7 times [2024-02-19 14:50:51,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:51,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098332568] [2024-02-19 14:50:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:51,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:51,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:51,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098332568] [2024-02-19 14:50:51,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098332568] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:51,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:51,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-19 14:50:51,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255791231] [2024-02-19 14:50:51,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:51,404 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-19 14:50:51,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:51,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-19 14:50:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-19 14:50:51,411 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-02-19 14:50:51,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 493 transitions, 15284 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:51,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:51,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-02-19 14:50:51,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:51,622 INFO L124 PetriNetUnfolderBase]: 624/1112 cut-off events. [2024-02-19 14:50:51,623 INFO L125 PetriNetUnfolderBase]: For 3576/3576 co-relation queries the response was YES. [2024-02-19 14:50:51,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17835 conditions, 1112 events. 624/1112 cut-off events. For 3576/3576 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5316 event pairs, 0 based on Foata normal form. 4/1111 useless extension candidates. Maximal degree in co-relation 14996. Up to 764 conditions per place. [2024-02-19 14:50:51,635 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 313 selfloop transitions, 34 changer transitions 99/476 dead transitions. [2024-02-19 14:50:51,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 476 transitions, 15646 flow [2024-02-19 14:50:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-19 14:50:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-19 14:50:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-02-19 14:50:51,637 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-02-19 14:50:51,637 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2024-02-19 14:50:51,637 INFO L507 AbstractCegarLoop]: Abstraction has has 122 places, 476 transitions, 15646 flow [2024-02-19 14:50:51,637 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:51,638 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:51,638 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:51,638 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-19 14:50:51,638 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:51,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:51,638 INFO L85 PathProgramCache]: Analyzing trace with hash -801096038, now seen corresponding path program 1 times [2024-02-19 14:50:51,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:51,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336797775] [2024-02-19 14:50:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:51,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-19 14:50:51,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:51,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336797775] [2024-02-19 14:50:51,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336797775] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:50:51,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:50:51,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-19 14:50:51,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68456233] [2024-02-19 14:50:51,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:50:51,739 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-19 14:50:51,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:51,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-19 14:50:51,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-19 14:50:51,740 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-02-19 14:50:51,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 476 transitions, 15646 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:51,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:51,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-02-19 14:50:51,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:51,962 INFO L124 PetriNetUnfolderBase]: 729/1362 cut-off events. [2024-02-19 14:50:51,963 INFO L125 PetriNetUnfolderBase]: For 6587/6587 co-relation queries the response was YES. [2024-02-19 14:50:51,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22783 conditions, 1362 events. 729/1362 cut-off events. For 6587/6587 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7184 event pairs, 0 based on Foata normal form. 34/1390 useless extension candidates. Maximal degree in co-relation 15720. Up to 846 conditions per place. [2024-02-19 14:50:51,978 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 306 selfloop transitions, 2 changer transitions 216/594 dead transitions. [2024-02-19 14:50:51,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 594 transitions, 20768 flow [2024-02-19 14:50:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-19 14:50:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-19 14:50:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-02-19 14:50:51,980 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-02-19 14:50:51,980 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 98 predicate places. [2024-02-19 14:50:51,980 INFO L507 AbstractCegarLoop]: Abstraction has has 125 places, 594 transitions, 20768 flow [2024-02-19 14:50:51,980 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:51,981 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:51,981 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:51,981 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-19 14:50:51,981 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:51,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:51,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1342807333, now seen corresponding path program 1 times [2024-02-19 14:50:51,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:51,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222320520] [2024-02-19 14:50:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:51,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:52,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222320520] [2024-02-19 14:50:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222320520] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:50:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529523624] [2024-02-19 14:50:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:52,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:52,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:50:52,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:50:52,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:50:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:52,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 14:50:52,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:50:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:52,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:50:52,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-02-19 14:50:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:52,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529523624] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:50:52,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:50:52,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-02-19 14:50:52,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859142910] [2024-02-19 14:50:52,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:50:52,394 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-19 14:50:52,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-19 14:50:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-02-19 14:50:52,395 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-02-19 14:50:52,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 594 transitions, 20768 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:52,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:52,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-02-19 14:50:52,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:53,144 INFO L124 PetriNetUnfolderBase]: 1899/3414 cut-off events. [2024-02-19 14:50:53,144 INFO L125 PetriNetUnfolderBase]: For 20131/20131 co-relation queries the response was YES. [2024-02-19 14:50:53,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60172 conditions, 3414 events. 1899/3414 cut-off events. For 20131/20131 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20603 event pairs, 2 based on Foata normal form. 2/3406 useless extension candidates. Maximal degree in co-relation 27408. Up to 2480 conditions per place. [2024-02-19 14:50:53,179 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 816 selfloop transitions, 120 changer transitions 386/1392 dead transitions. [2024-02-19 14:50:53,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 1392 transitions, 52355 flow [2024-02-19 14:50:53,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:50:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:50:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-02-19 14:50:53,181 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5353535353535354 [2024-02-19 14:50:53,181 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 108 predicate places. [2024-02-19 14:50:53,181 INFO L507 AbstractCegarLoop]: Abstraction has has 135 places, 1392 transitions, 52355 flow [2024-02-19 14:50:53,181 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:53,181 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:53,181 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:53,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 14:50:53,392 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-19 14:50:53,392 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:53,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1726251155, now seen corresponding path program 2 times [2024-02-19 14:50:53,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:53,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224418012] [2024-02-19 14:50:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:53,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:53,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:53,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224418012] [2024-02-19 14:50:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224418012] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:50:53,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249890333] [2024-02-19 14:50:53,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:50:53,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:53,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:50:53,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:50:53,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 14:50:53,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:50:53,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:50:53,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-19 14:50:53,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:50:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:53,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:50:53,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 12 [2024-02-19 14:50:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-19 14:50:53,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249890333] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:50:53,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:50:53,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-02-19 14:50:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084559862] [2024-02-19 14:50:53,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:50:53,830 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-19 14:50:53,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-19 14:50:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-02-19 14:50:53,831 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-02-19 14:50:53,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 1392 transitions, 52355 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:53,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:53,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-02-19 14:50:53,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:50:56,127 INFO L124 PetriNetUnfolderBase]: 4406/7751 cut-off events. [2024-02-19 14:50:56,128 INFO L125 PetriNetUnfolderBase]: For 57994/57994 co-relation queries the response was YES. [2024-02-19 14:50:56,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143181 conditions, 7751 events. 4406/7751 cut-off events. For 57994/57994 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 53029 event pairs, 10 based on Foata normal form. 5/7744 useless extension candidates. Maximal degree in co-relation 38062. Up to 5877 conditions per place. [2024-02-19 14:50:56,270 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 1730 selfloop transitions, 200 changer transitions 1073/3073 dead transitions. [2024-02-19 14:50:56,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 3073 transitions, 122634 flow [2024-02-19 14:50:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-19 14:50:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-19 14:50:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-02-19 14:50:56,271 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-02-19 14:50:56,272 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 115 predicate places. [2024-02-19 14:50:56,272 INFO L507 AbstractCegarLoop]: Abstraction has has 142 places, 3073 transitions, 122634 flow [2024-02-19 14:50:56,272 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:56,272 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:50:56,272 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:50:56,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-19 14:50:56,482 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:56,483 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:50:56,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:50:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash -950311964, now seen corresponding path program 3 times [2024-02-19 14:50:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:50:56,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520119837] [2024-02-19 14:50:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:50:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:50:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:50:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:50:56,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:50:56,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520119837] [2024-02-19 14:50:56,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520119837] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:50:56,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848305901] [2024-02-19 14:50:56,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:50:56,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:50:56,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:50:56,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:50:56,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-19 14:50:56,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:50:56,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:50:56,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:50:56,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:50:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:50:56,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:50:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:50:56,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848305901] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:50:56,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:50:56,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 14:50:56,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033962516] [2024-02-19 14:50:56,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:50:56,816 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 14:50:56,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:50:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 14:50:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-02-19 14:50:56,822 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:50:56,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 3073 transitions, 122634 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:50:56,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:50:56,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:50:56,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:05,073 INFO L124 PetriNetUnfolderBase]: 6836/11713 cut-off events. [2024-02-19 14:51:05,073 INFO L125 PetriNetUnfolderBase]: For 88722/88722 co-relation queries the response was YES. [2024-02-19 14:51:05,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226762 conditions, 11713 events. 6836/11713 cut-off events. For 88722/88722 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 81635 event pairs, 10 based on Foata normal form. 332/12033 useless extension candidates. Maximal degree in co-relation 58709. Up to 9294 conditions per place. [2024-02-19 14:51:05,230 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 2122 selfloop transitions, 898 changer transitions 1515/4536 dead transitions. [2024-02-19 14:51:05,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 4536 transitions, 189731 flow [2024-02-19 14:51:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-19 14:51:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-19 14:51:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 297 transitions. [2024-02-19 14:51:05,232 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-02-19 14:51:05,233 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 143 predicate places. [2024-02-19 14:51:05,233 INFO L507 AbstractCegarLoop]: Abstraction has has 170 places, 4536 transitions, 189731 flow [2024-02-19 14:51:05,233 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:51:05,233 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:05,233 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:05,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-19 14:51:05,444 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:51:05,444 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:05,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash -636371015, now seen corresponding path program 4 times [2024-02-19 14:51:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:05,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709376683] [2024-02-19 14:51:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:05,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:51:05,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709376683] [2024-02-19 14:51:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709376683] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:51:05,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729931727] [2024-02-19 14:51:05,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:51:05,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:51:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:51:05,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:51:05,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-19 14:51:05,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:51:05,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:51:05,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:51:05,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:51:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:51:05,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:51:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:51:05,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729931727] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:51:05,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:51:05,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-19 14:51:05,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850853443] [2024-02-19 14:51:05,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:51:05,744 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-19 14:51:05,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-19 14:51:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-02-19 14:51:05,757 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:51:05,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 4536 transitions, 189731 flow. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:51:05,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:05,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:51:05,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:51:28,384 INFO L124 PetriNetUnfolderBase]: 10343/17474 cut-off events. [2024-02-19 14:51:28,385 INFO L125 PetriNetUnfolderBase]: For 134004/134004 co-relation queries the response was YES. [2024-02-19 14:51:28,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357049 conditions, 17474 events. 10343/17474 cut-off events. For 134004/134004 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 126198 event pairs, 2 based on Foata normal form. 156/17618 useless extension candidates. Maximal degree in co-relation 91495. Up to 15055 conditions per place. [2024-02-19 14:51:28,607 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 3630 selfloop transitions, 707 changer transitions 2374/6712 dead transitions. [2024-02-19 14:51:28,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 6712 transitions, 294424 flow [2024-02-19 14:51:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-19 14:51:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-19 14:51:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 190 transitions. [2024-02-19 14:51:28,609 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4139433551198257 [2024-02-19 14:51:28,609 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 159 predicate places. [2024-02-19 14:51:28,609 INFO L507 AbstractCegarLoop]: Abstraction has has 186 places, 6712 transitions, 294424 flow [2024-02-19 14:51:28,609 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:51:28,610 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:51:28,610 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:51:28,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-19 14:51:28,819 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-02-19 14:51:28,819 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:51:28,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:51:28,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1663433793, now seen corresponding path program 5 times [2024-02-19 14:51:28,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:51:28,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450276966] [2024-02-19 14:51:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:51:28,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:51:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:51:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:51:28,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:51:28,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450276966] [2024-02-19 14:51:28,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450276966] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:51:28,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84111589] [2024-02-19 14:51:28,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:51:28,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:51:28,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:51:28,917 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:51:28,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-19 14:51:29,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 14:51:29,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:51:29,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:51:29,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:51:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:51:29,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:51:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-19 14:51:29,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84111589] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:51:29,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:51:29,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-02-19 14:51:29,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259493675] [2024-02-19 14:51:29,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:51:29,134 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:51:29,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:51:29,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:51:29,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:51:29,143 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:51:29,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 6712 transitions, 294424 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:51:29,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:51:29,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:51:29,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:09,543 INFO L124 PetriNetUnfolderBase]: 11056/18485 cut-off events. [2024-02-19 14:52:09,543 INFO L125 PetriNetUnfolderBase]: For 148952/148952 co-relation queries the response was YES. [2024-02-19 14:52:09,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394320 conditions, 18485 events. 11056/18485 cut-off events. For 148952/148952 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 131931 event pairs, 4 based on Foata normal form. 286/18759 useless extension candidates. Maximal degree in co-relation 101715. Up to 16002 conditions per place. [2024-02-19 14:52:09,752 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 3627 selfloop transitions, 987 changer transitions 2395/7010 dead transitions. [2024-02-19 14:52:09,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 7010 transitions, 321065 flow [2024-02-19 14:52:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-19 14:52:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-19 14:52:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 208 transitions. [2024-02-19 14:52:09,754 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-02-19 14:52:09,758 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 178 predicate places. [2024-02-19 14:52:09,758 INFO L507 AbstractCegarLoop]: Abstraction has has 205 places, 7010 transitions, 321065 flow [2024-02-19 14:52:09,758 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:52:09,758 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:09,758 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:52:09,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-19 14:52:09,969 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:09,970 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:09,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1127728391, now seen corresponding path program 6 times [2024-02-19 14:52:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:09,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424843840] [2024-02-19 14:52:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:52:10,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:10,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424843840] [2024-02-19 14:52:10,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424843840] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:10,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920719394] [2024-02-19 14:52:10,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 14:52:10,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:10,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:52:10,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-19 14:52:10,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-19 14:52:10,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:52:10,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:52:10,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:52:10,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:52:10,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920719394] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:10,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:10,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-02-19 14:52:10,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953618696] [2024-02-19 14:52:10,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:10,328 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:52:10,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:10,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:52:10,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:52:10,342 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:52:10,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 7010 transitions, 321065 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:52:10,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:10,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:52:10,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:52:58,760 INFO L124 PetriNetUnfolderBase]: 12125/20156 cut-off events. [2024-02-19 14:52:58,760 INFO L125 PetriNetUnfolderBase]: For 158344/158344 co-relation queries the response was YES. [2024-02-19 14:52:58,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450451 conditions, 20156 events. 12125/20156 cut-off events. For 158344/158344 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 144001 event pairs, 4 based on Foata normal form. 84/20228 useless extension candidates. Maximal degree in co-relation 117021. Up to 17673 conditions per place. [2024-02-19 14:52:58,997 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 4595 selfloop transitions, 432 changer transitions 2576/7604 dead transitions. [2024-02-19 14:52:58,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 7604 transitions, 363444 flow [2024-02-19 14:52:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-19 14:52:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-19 14:52:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-02-19 14:52:58,998 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-02-19 14:52:58,998 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 188 predicate places. [2024-02-19 14:52:58,998 INFO L507 AbstractCegarLoop]: Abstraction has has 215 places, 7604 transitions, 363444 flow [2024-02-19 14:52:58,998 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:52:58,998 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:52:58,998 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:52:59,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-02-19 14:52:59,209 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-02-19 14:52:59,210 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:52:59,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:52:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1058618084, now seen corresponding path program 7 times [2024-02-19 14:52:59,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:52:59,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607842159] [2024-02-19 14:52:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:52:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:52:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:52:59,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:52:59,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607842159] [2024-02-19 14:52:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607842159] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:52:59,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488283903] [2024-02-19 14:52:59,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-19 14:52:59,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:52:59,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:52:59,317 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:52:59,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-19 14:52:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:52:59,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:52:59,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:52:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:52:59,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:52:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:52:59,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488283903] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:52:59,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:52:59,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-02-19 14:52:59,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760478653] [2024-02-19 14:52:59,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:52:59,513 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-19 14:52:59,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:52:59,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-19 14:52:59,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-02-19 14:52:59,517 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:52:59,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 7604 transitions, 363444 flow. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:52:59,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:52:59,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:52:59,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:54:08,940 INFO L124 PetriNetUnfolderBase]: 14656/24444 cut-off events. [2024-02-19 14:54:08,941 INFO L125 PetriNetUnfolderBase]: For 186485/186485 co-relation queries the response was YES. [2024-02-19 14:54:08,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569959 conditions, 24444 events. 14656/24444 cut-off events. For 186485/186485 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 181957 event pairs, 8 based on Foata normal form. 112/24544 useless extension candidates. Maximal degree in co-relation 146907. Up to 21957 conditions per place. [2024-02-19 14:54:09,255 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 4635 selfloop transitions, 1402 changer transitions 3159/9197 dead transitions. [2024-02-19 14:54:09,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 9197 transitions, 457877 flow [2024-02-19 14:54:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-19 14:54:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-19 14:54:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 159 transitions. [2024-02-19 14:54:09,257 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-02-19 14:54:09,257 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 202 predicate places. [2024-02-19 14:54:09,257 INFO L507 AbstractCegarLoop]: Abstraction has has 229 places, 9197 transitions, 457877 flow [2024-02-19 14:54:09,257 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:54:09,257 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:54:09,258 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:54:09,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-19 14:54:09,468 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-02-19 14:54:09,469 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:54:09,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:54:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash -491895687, now seen corresponding path program 8 times [2024-02-19 14:54:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:54:09,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873631911] [2024-02-19 14:54:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:54:09,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:54:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:54:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:54:09,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:54:09,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873631911] [2024-02-19 14:54:09,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873631911] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:54:09,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209685690] [2024-02-19 14:54:09,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:54:09,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:54:09,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:54:09,543 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:54:09,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-19 14:54:09,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:54:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:54:09,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:54:09,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:54:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:54:09,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:54:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:54:09,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209685690] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:54:09,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:54:09,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-02-19 14:54:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926211918] [2024-02-19 14:54:09,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:54:09,718 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-19 14:54:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:54:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-19 14:54:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-02-19 14:54:09,728 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:54:09,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 9197 transitions, 457877 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:54:09,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:54:09,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:54:09,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:55:48,120 INFO L124 PetriNetUnfolderBase]: 15262/25490 cut-off events. [2024-02-19 14:55:48,121 INFO L125 PetriNetUnfolderBase]: For 198659/198659 co-relation queries the response was YES. [2024-02-19 14:55:48,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620663 conditions, 25490 events. 15262/25490 cut-off events. For 198659/198659 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 191429 event pairs, 4 based on Foata normal form. 16/25494 useless extension candidates. Maximal degree in co-relation 160926. Up to 23003 conditions per place. [2024-02-19 14:55:48,452 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 5853 selfloop transitions, 430 changer transitions 3312/9596 dead transitions. [2024-02-19 14:55:48,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 9596 transitions, 496987 flow [2024-02-19 14:55:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-19 14:55:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-19 14:55:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-02-19 14:55:48,453 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-02-19 14:55:48,453 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 208 predicate places. [2024-02-19 14:55:48,453 INFO L507 AbstractCegarLoop]: Abstraction has has 235 places, 9596 transitions, 496987 flow [2024-02-19 14:55:48,454 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:55:48,454 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:55:48,454 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:55:48,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-02-19 14:55:48,655 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-19 14:55:48,657 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:55:48,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:55:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1817102684, now seen corresponding path program 9 times [2024-02-19 14:55:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:55:48,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236253441] [2024-02-19 14:55:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:55:48,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:55:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:55:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:55:48,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:55:48,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236253441] [2024-02-19 14:55:48,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236253441] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:55:48,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537946122] [2024-02-19 14:55:48,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:55:48,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:55:48,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:55:48,786 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:55:48,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-19 14:55:48,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-19 14:55:48,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:55:48,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:55:48,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:55:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:55:48,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:55:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:55:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537946122] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:55:49,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:55:49,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-19 14:55:49,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682460663] [2024-02-19 14:55:49,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:55:49,026 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:55:49,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:55:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:55:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:55:49,036 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:55:49,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 9596 transitions, 496987 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:55:49,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:55:49,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:55:49,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:57:57,658 INFO L124 PetriNetUnfolderBase]: 18362/30660 cut-off events. [2024-02-19 14:57:57,659 INFO L125 PetriNetUnfolderBase]: For 231492/231492 co-relation queries the response was YES. [2024-02-19 14:57:57,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775320 conditions, 30660 events. 18362/30660 cut-off events. For 231492/231492 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 235444 event pairs, 6 based on Foata normal form. 232/30880 useless extension candidates. Maximal degree in co-relation 201044. Up to 28173 conditions per place. [2024-02-19 14:57:58,093 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 5725 selfloop transitions, 1778 changer transitions 3916/11420 dead transitions. [2024-02-19 14:57:58,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 11420 transitions, 613907 flow [2024-02-19 14:57:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-19 14:57:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-19 14:57:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 174 transitions. [2024-02-19 14:57:58,109 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-02-19 14:57:58,109 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 223 predicate places. [2024-02-19 14:57:58,109 INFO L507 AbstractCegarLoop]: Abstraction has has 250 places, 11420 transitions, 613907 flow [2024-02-19 14:57:58,109 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:57:58,109 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:57:58,110 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:57:58,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-19 14:57:58,310 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-02-19 14:57:58,310 INFO L432 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:57:58,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:57:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2069797083, now seen corresponding path program 10 times [2024-02-19 14:57:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:57:58,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485258855] [2024-02-19 14:57:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:57:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:57:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:57:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:57:58,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:57:58,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485258855] [2024-02-19 14:57:58,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485258855] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:57:58,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265646704] [2024-02-19 14:57:58,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:57:58,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:57:58,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:57:58,417 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 14:57:58,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-19 14:57:58,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:57:58,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:57:58,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:57:58,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:57:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:57:58,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:57:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 14:57:58,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265646704] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:57:58,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:57:58,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-19 14:57:58,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475781822] [2024-02-19 14:57:58,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:57:58,608 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:57:58,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:57:58,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:57:58,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:57:58,611 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 14:57:58,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 11420 transitions, 613907 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:57:58,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:57:58,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 14:57:58,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:00:34,392 INFO L124 PetriNetUnfolderBase]: 18749/31301 cut-off events. [2024-02-19 15:00:34,392 INFO L125 PetriNetUnfolderBase]: For 235208/235208 co-relation queries the response was YES. [2024-02-19 15:00:34,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823136 conditions, 31301 events. 18749/31301 cut-off events. For 235208/235208 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 241146 event pairs, 4 based on Foata normal form. 24/31313 useless extension candidates. Maximal degree in co-relation 214576. Up to 28814 conditions per place. [2024-02-19 15:00:34,865 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 6993 selfloop transitions, 642 changer transitions 4020/11656 dead transitions. [2024-02-19 15:00:34,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 11656 transitions, 649953 flow [2024-02-19 15:00:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 15:00:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 15:00:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-02-19 15:00:34,870 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42901234567901236 [2024-02-19 15:00:34,871 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 234 predicate places. [2024-02-19 15:00:34,871 INFO L507 AbstractCegarLoop]: Abstraction has has 261 places, 11656 transitions, 649953 flow [2024-02-19 15:00:34,871 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:00:34,871 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:00:34,871 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:00:34,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-19 15:00:35,082 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:00:35,083 INFO L432 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:00:35,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:00:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash 74634595, now seen corresponding path program 11 times [2024-02-19 15:00:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:00:35,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122505701] [2024-02-19 15:00:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:00:35,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:00:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:00:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:00:35,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:00:35,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122505701] [2024-02-19 15:00:35,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122505701] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:00:35,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648858555] [2024-02-19 15:00:35,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 15:00:35,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:00:35,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:00:35,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:00:35,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-19 15:00:35,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-19 15:00:35,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:00:35,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 15:00:35,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:00:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:00:35,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:00:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:00:35,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648858555] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:00:35,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:00:35,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-19 15:00:35,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869857641] [2024-02-19 15:00:35,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:00:35,384 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:00:35,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:00:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:00:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:00:35,398 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 15:00:35,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 11656 transitions, 649953 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:00:35,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:00:35,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 15:00:35,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 15:03:33,910 INFO L124 PetriNetUnfolderBase]: 19827/32939 cut-off events. [2024-02-19 15:03:33,911 INFO L125 PetriNetUnfolderBase]: For 251774/251774 co-relation queries the response was YES. [2024-02-19 15:03:33,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898445 conditions, 32939 events. 19827/32939 cut-off events. For 251774/251774 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 254437 event pairs, 6 based on Foata normal form. 78/33005 useless extension candidates. Maximal degree in co-relation 235650. Up to 30452 conditions per place. [2024-02-19 15:03:34,606 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 6330 selfloop transitions, 1716 changer transitions 4169/12216 dead transitions. [2024-02-19 15:03:34,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 12216 transitions, 705335 flow [2024-02-19 15:03:34,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-19 15:03:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-19 15:03:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 234 transitions. [2024-02-19 15:03:34,607 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-02-19 15:03:34,607 INFO L308 CegarLoopForPetriNet]: 27 programPoint places, 255 predicate places. [2024-02-19 15:03:34,607 INFO L507 AbstractCegarLoop]: Abstraction has has 282 places, 12216 transitions, 705335 flow [2024-02-19 15:03:34,608 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:03:34,608 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 15:03:34,608 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 15:03:34,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-19 15:03:34,819 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-02-19 15:03:34,820 INFO L432 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 15:03:34,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 15:03:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2066820483, now seen corresponding path program 12 times [2024-02-19 15:03:34,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 15:03:34,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230774508] [2024-02-19 15:03:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 15:03:34,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 15:03:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 15:03:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:03:34,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 15:03:34,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230774508] [2024-02-19 15:03:34,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230774508] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 15:03:34,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492568752] [2024-02-19 15:03:34,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-19 15:03:34,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 15:03:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 15:03:34,890 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-19 15:03:34,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-19 15:03:35,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-19 15:03:35,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 15:03:35,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 15:03:35,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 15:03:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:03:35,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 15:03:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-19 15:03:35,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492568752] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 15:03:35,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 15:03:35,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-19 15:03:35,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466114636] [2024-02-19 15:03:35,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 15:03:35,087 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-19 15:03:35,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 15:03:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-19 15:03:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-02-19 15:03:35,108 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-19 15:03:35,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 12216 transitions, 705335 flow. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 15:03:35,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 15:03:35,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-19 15:03:35,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15